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Submitted on: 27 March 2001.
Revised on: 11 June 2001.
Accepted on: 04 August 2001.
___________________Cuadernos de Gestion---UNIV PAIS VASCO, INST ECONOMIA APLICADA EMPRESA
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Submitted on: 26 May 2019.
Revised on: 03 September 2019.
Accepted on: 11 October 2019.
___________________Cuadernos de Gestion---UNIV PAIS VASCO, INST ECONOMIA APLICADA EMPRESA
http://reply.papertrans.cn/1/68/6751/6751-26.png
Submitted on: 15 March 2010.
Revised on: 26 June 2010.
Accepted on: 27 July 2010.
___________________Cuadernos de Gestion---UNIV PAIS VASCO, INST ECONOMIA APLICADA EMPRESA
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Submitted on: 10 July 2013.
Revised on: 17 October 2013.
Accepted on: 26 November 2013.
___________________Cuadernos de Gestion---UNIV PAIS VASCO, INST ECONOMIA APLICADA EMPRESA